At this step, you should not receive any error. If you have configured the
Pre-Installation
steps correctly, then you will not get any errors. I get one warning here as
you can see which
is complaining about the low memory than required. I had only 512 MB ram and
the required memory
is 1GB but I would not worry about this warning and will check the status box.

Click Next

Click Next

Leave the Default values (dba, dba) and Click Next

Select "Install database Software Only" and Click
Next

Click Install

Execute the mentioned script on all the nodes.

At this time, create an env file on all the nodes with the appropriate value
of ORACLE_HOME and PATH.

oracle@node1-pub ~]$ cat
.bash_profile
# .bash_profile

# Get the aliases and functions
if [ -f ~/.bashrc ]; then
. ~/.bashrc
fi